/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.streaming.connectors.redis.mapper;

/** All available data type for Redis. */
public enum RedisDataType {

    /**
     * Strings are the most basic kind of Redis value. Redis Strings are binary safe, this means
     * that a Redis string can contain any kind of data, for instance a JPEG image or a serialized
     * Ruby object. A String value can be at max 512 Megabytes in length.
     */
    STRING,

    /** Redis Hashes are maps between string fields and string values. */
    HASH,

    /** Redis Lists are simply lists of strings, sorted by insertion order. */
    LIST,

    /** Redis Sets are an unordered collection of Strings. */
    SET,

    /**
     * Redis Sorted Sets are, similarly to Redis Sets, non repeating collections of Strings. The
     * difference is that every member of a Sorted Set is associated with score, that is used in
     * order to take the sorted set ordered, from the smallest to the greatest score. While members
     * are unique, scores may be repeated.
     */
    SORTED_SET,

    /** HyperLogLog is a probabilistic data structure used in order to count unique things. */
    HYPER_LOG_LOG,

    /**
     * Redis implementation of publish and subscribe paradigm. Published messages are characterized
     * into channels, without knowledge of what (if any) subscribers there may be. Subscribers
     * express interest in one or more channels, and only receive messages that are of interest,
     * without knowledge of what (if any) publishers there are.
     */
    PUBSUB
}
